Commit | Line | Data |
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5ff67f98 | 1 | /* |
71d47350 | 2 | * Copyright (c) 1983, 1988 Regents of the University of California. |
0eb85d71 KB |
3 | * All rights reserved. |
4 | * | |
d60d530a | 5 | * %sccs.include.redist.c% |
5ff67f98 DF |
6 | */ |
7 | ||
8 | #ifndef lint | |
9 | char copyright[] = | |
71d47350 | 10 | "@(#) Copyright (c) 1983, 1988 Regents of the University of California.\n\ |
5ff67f98 | 11 | All rights reserved.\n"; |
0eb85d71 | 12 | #endif /* not lint */ |
5ff67f98 | 13 | |
fdd0ed12 | 14 | #ifndef lint |
ad76aa05 | 15 | static char sccsid[] = "@(#)main.c 5.24 (Berkeley) %G%"; |
0eb85d71 | 16 | #endif /* not lint */ |
fdd0ed12 SL |
17 | |
18 | /* | |
19 | * Routing Table Management Daemon | |
20 | */ | |
7fe7fe74 | 21 | #include "defs.h" |
fdd0ed12 | 22 | #include <sys/ioctl.h> |
4033c8f6 | 23 | #include <sys/file.h> |
e2feeea9 | 24 | |
fdd0ed12 | 25 | #include <net/if.h> |
e2feeea9 | 26 | |
71d47350 MK |
27 | #include <sys/errno.h> |
28 | #include <sys/signal.h> | |
29 | #include <sys/syslog.h> | |
7abf8d65 | 30 | #include "pathnames.h" |
fdd0ed12 SL |
31 | |
32 | int supplier = -1; /* process should supply updates */ | |
d002aa8c | 33 | int gateway = 0; /* 1 if we are a gateway to parts beyond */ |
7892134c | 34 | int debug = 0; |
4033c8f6 | 35 | int bufspace = 127*1024; /* max. input buffer size to request */ |
fdd0ed12 SL |
36 | |
37 | struct rip *msg = (struct rip *)packet; | |
49dac2b7 | 38 | void hup(), rtdeleteall(), sigtrace(), timer(); |
fdd0ed12 SL |
39 | |
40 | main(argc, argv) | |
41 | int argc; | |
42 | char *argv[]; | |
43 | { | |
4033c8f6 | 44 | int n, cc, nfd, omask, tflags = 0; |
fdd0ed12 | 45 | struct sockaddr from; |
4033c8f6 MK |
46 | struct timeval *tvp, waittime; |
47 | struct itimerval itval; | |
314ebe0b | 48 | register struct rip *query = msg; |
4033c8f6 | 49 | fd_set ibits; |
7fe7fe74 | 50 | u_char retry; |
fdd0ed12 SL |
51 | |
52 | argv0 = argv; | |
265a3175 | 53 | #if BSD >= 43 |
a349306d | 54 | openlog("routed", LOG_PID | LOG_ODELAY, LOG_DAEMON); |
bb3e151c | 55 | setlogmask(LOG_WARNING); |
fdd0ed12 | 56 | sp = getservbyname("router", "udp"); |
7fe7fe74 SL |
57 | if (sp == NULL) { |
58 | fprintf(stderr, "routed: router/udp: unknown service\n"); | |
fdd0ed12 SL |
59 | exit(1); |
60 | } | |
7fe7fe74 SL |
61 | addr.sin_family = AF_INET; |
62 | addr.sin_port = sp->s_port; | |
ad76aa05 KS |
63 | r = socket(AF_ROUTE, SOCK_RAW, 0); |
64 | /* later, get smart about lookingforinterfaces */ | |
65 | if (r) | |
66 | shutdown(r, 0); /* for now, don't want reponses */ | |
67 | else { | |
68 | fprintf(stderr, "routed: no routing socket\n"); | |
69 | exit(1); | |
70 | } | |
7fe7fe74 SL |
71 | s = getsocket(AF_INET, SOCK_DGRAM, &addr); |
72 | if (s < 0) | |
73 | exit(1); | |
fdd0ed12 SL |
74 | argv++, argc--; |
75 | while (argc > 0 && **argv == '-') { | |
d4b6a849 | 76 | if (strcmp(*argv, "-s") == 0) { |
fdd0ed12 SL |
77 | supplier = 1; |
78 | argv++, argc--; | |
79 | continue; | |
80 | } | |
d4b6a849 | 81 | if (strcmp(*argv, "-q") == 0) { |
fdd0ed12 SL |
82 | supplier = 0; |
83 | argv++, argc--; | |
84 | continue; | |
85 | } | |
d4b6a849 | 86 | if (strcmp(*argv, "-t") == 0) { |
4033c8f6 | 87 | tflags++; |
bb3e151c | 88 | setlogmask(LOG_DEBUG); |
17fe297f MK |
89 | argv++, argc--; |
90 | continue; | |
91 | } | |
92 | if (strcmp(*argv, "-d") == 0) { | |
7892134c | 93 | debug++; |
bb3e151c | 94 | setlogmask(LOG_DEBUG); |
d4b6a849 SL |
95 | argv++, argc--; |
96 | continue; | |
97 | } | |
5562f0a3 MK |
98 | if (strcmp(*argv, "-g") == 0) { |
99 | gateway = 1; | |
100 | argv++, argc--; | |
101 | continue; | |
102 | } | |
5562f0a3 | 103 | fprintf(stderr, |
d002aa8c | 104 | "usage: routed [ -s ] [ -q ] [ -t ] [ -g ]\n"); |
fdd0ed12 SL |
105 | exit(1); |
106 | } | |
4033c8f6 | 107 | |
43d42ac6 MK |
108 | if (debug == 0) |
109 | daemon(0, 0); | |
7fe7fe74 SL |
110 | /* |
111 | * Any extra argument is considered | |
112 | * a tracing log file. | |
113 | */ | |
114 | if (argc > 0) | |
115 | traceon(*argv); | |
4033c8f6 MK |
116 | while (tflags-- > 0) |
117 | bumploglevel(); | |
118 | ||
119 | (void) gettimeofday(&now, (struct timezone *)NULL); | |
fdd0ed12 SL |
120 | /* |
121 | * Collect an initial view of the world by | |
d002aa8c | 122 | * checking the interface configuration and the gateway kludge |
fdd0ed12 SL |
123 | * file. Then, send a request packet on all |
124 | * directly connected networks to find out what | |
125 | * everyone else thinks. | |
126 | */ | |
127 | rtinit(); | |
fdd0ed12 | 128 | ifinit(); |
34894a1d | 129 | gwkludge(); |
d002aa8c MK |
130 | if (gateway > 0) |
131 | rtdefault(); | |
fdd0ed12 SL |
132 | if (supplier < 0) |
133 | supplier = 0; | |
314ebe0b MK |
134 | query->rip_cmd = RIPCMD_REQUEST; |
135 | query->rip_vers = RIPVERSION; | |
136 | if (sizeof(query->rip_nets[0].rip_dst.sa_family) > 1) /* XXX */ | |
137 | query->rip_nets[0].rip_dst.sa_family = htons((u_short)AF_UNSPEC); | |
4033c8f6 | 138 | else |
314ebe0b MK |
139 | query->rip_nets[0].rip_dst.sa_family = AF_UNSPEC; |
140 | query->rip_nets[0].rip_metric = htonl((u_long)HOPCNT_INFINITY); | |
49dac2b7 | 141 | toall(sndmsg); |
ce5e9df4 | 142 | signal(SIGALRM, timer); |
b7e4f8be | 143 | signal(SIGHUP, hup); |
69b7ef61 | 144 | signal(SIGTERM, hup); |
7892134c | 145 | signal(SIGINT, rtdeleteall); |
71d47350 MK |
146 | signal(SIGUSR1, sigtrace); |
147 | signal(SIGUSR2, sigtrace); | |
4033c8f6 MK |
148 | itval.it_interval.tv_sec = TIMER_RATE; |
149 | itval.it_value.tv_sec = TIMER_RATE; | |
150 | itval.it_interval.tv_usec = 0; | |
151 | itval.it_value.tv_usec = 0; | |
152 | srandom(getpid()); | |
153 | if (setitimer(ITIMER_REAL, &itval, (struct itimerval *)NULL) < 0) | |
154 | syslog(LOG_ERR, "setitimer: %m\n"); | |
fdd0ed12 | 155 | |
4033c8f6 MK |
156 | FD_ZERO(&ibits); |
157 | nfd = s + 1; /* 1 + max(fd's) */ | |
fdd0ed12 | 158 | for (;;) { |
4033c8f6 MK |
159 | FD_SET(s, &ibits); |
160 | /* | |
161 | * If we need a dynamic update that was held off, | |
162 | * needupdate will be set, and nextbcast is the time | |
163 | * by which we want select to return. Compute time | |
164 | * until dynamic update should be sent, and select only | |
165 | * until then. If we have already passed nextbcast, | |
166 | * just poll. | |
167 | */ | |
168 | if (needupdate) { | |
169 | waittime = nextbcast; | |
170 | timevalsub(&waittime, &now); | |
171 | if (waittime.tv_sec < 0) { | |
172 | waittime.tv_sec = 0; | |
173 | waittime.tv_usec = 0; | |
174 | } | |
175 | if (traceactions) | |
176 | fprintf(ftrace, | |
177 | "select until dynamic update %d/%d sec/usec\n", | |
178 | waittime.tv_sec, waittime.tv_usec); | |
179 | tvp = &waittime; | |
180 | } else | |
181 | tvp = (struct timeval *)NULL; | |
182 | n = select(nfd, &ibits, 0, 0, tvp); | |
183 | if (n <= 0) { | |
184 | /* | |
185 | * Need delayed dynamic update if select returned | |
186 | * nothing and we timed out. Otherwise, ignore | |
187 | * errors (e.g. EINTR). | |
188 | */ | |
189 | if (n < 0) { | |
190 | if (errno == EINTR) | |
191 | continue; | |
192 | syslog(LOG_ERR, "select: %m"); | |
193 | } | |
194 | omask = sigblock(sigmask(SIGALRM)); | |
195 | if (n == 0 && needupdate) { | |
196 | if (traceactions) | |
197 | fprintf(ftrace, | |
198 | "send delayed dynamic update\n"); | |
199 | (void) gettimeofday(&now, | |
200 | (struct timezone *)NULL); | |
201 | toall(supply, RTS_CHANGED, | |
202 | (struct interface *)NULL); | |
203 | lastbcast = now; | |
204 | needupdate = 0; | |
205 | nextbcast.tv_sec = 0; | |
206 | } | |
207 | sigsetmask(omask); | |
fdd0ed12 | 208 | continue; |
4033c8f6 MK |
209 | } |
210 | (void) gettimeofday(&now, (struct timezone *)NULL); | |
787d3210 | 211 | omask = sigblock(sigmask(SIGALRM)); |
4033c8f6 MK |
212 | #ifdef doesntwork |
213 | /* | |
214 | printf("s %d, ibits %x index %d, mod %d, sh %x, or %x &ibits %x\n", | |
215 | s, | |
216 | ibits.fds_bits[0], | |
217 | (s)/(sizeof(fd_mask) * 8), | |
218 | ((s) % (sizeof(fd_mask) * 8)), | |
219 | (1 << ((s) % (sizeof(fd_mask) * 8))), | |
220 | ibits.fds_bits[(s)/(sizeof(fd_mask) * 8)] & (1 << ((s) % (sizeof(fd_mask) * 8))), | |
221 | &ibits | |
222 | ); | |
223 | */ | |
224 | if (FD_ISSET(s, &ibits)) | |
225 | #else | |
226 | if (ibits.fds_bits[s/32] & (1 << s)) | |
227 | #endif | |
fdd0ed12 | 228 | process(s); |
7fe7fe74 | 229 | /* handle ICMP redirects */ |
787d3210 | 230 | sigsetmask(omask); |
fdd0ed12 SL |
231 | } |
232 | } | |
233 | ||
4033c8f6 MK |
234 | timevaladd(t1, t2) |
235 | struct timeval *t1, *t2; | |
236 | { | |
237 | ||
238 | t1->tv_sec += t2->tv_sec; | |
239 | if ((t1->tv_usec += t2->tv_usec) > 1000000) { | |
240 | t1->tv_sec++; | |
241 | t1->tv_usec -= 1000000; | |
242 | } | |
243 | } | |
244 | ||
245 | timevalsub(t1, t2) | |
246 | struct timeval *t1, *t2; | |
247 | { | |
248 | ||
249 | t1->tv_sec -= t2->tv_sec; | |
250 | if ((t1->tv_usec -= t2->tv_usec) < 0) { | |
251 | t1->tv_sec--; | |
252 | t1->tv_usec += 1000000; | |
253 | } | |
254 | } | |
255 | ||
fdd0ed12 SL |
256 | process(fd) |
257 | int fd; | |
258 | { | |
fdd0ed12 | 259 | struct sockaddr from; |
787d3210 MK |
260 | int fromlen, cc; |
261 | union { | |
262 | char buf[MAXPACKETSIZE+1]; | |
263 | struct rip rip; | |
264 | } inbuf; | |
4033c8f6 MK |
265 | |
266 | for (;;) { | |
267 | fromlen = sizeof (from); | |
787d3210 | 268 | cc = recvfrom(fd, &inbuf, sizeof (inbuf), 0, &from, &fromlen); |
4033c8f6 MK |
269 | if (cc <= 0) { |
270 | if (cc < 0 && errno != EWOULDBLOCK) | |
271 | perror("recvfrom"); | |
272 | break; | |
273 | } | |
274 | if (fromlen != sizeof (struct sockaddr_in)) | |
275 | break; | |
787d3210 | 276 | rip_input(&from, &inbuf.rip, cc); |
71d47350 | 277 | } |
fdd0ed12 | 278 | } |
7fe7fe74 SL |
279 | |
280 | getsocket(domain, type, sin) | |
281 | int domain, type; | |
282 | struct sockaddr_in *sin; | |
283 | { | |
4033c8f6 | 284 | int sock, on = 1; |
7fe7fe74 | 285 | |
4033c8f6 | 286 | if ((sock = socket(domain, type, 0)) < 0) { |
7fe7fe74 | 287 | perror("socket"); |
69b7ef61 | 288 | syslog(LOG_ERR, "socket: %m"); |
7fe7fe74 | 289 | return (-1); |
69b7ef61 | 290 | } |
265a3175 | 291 | #ifdef SO_BROADCAST |
4033c8f6 | 292 | if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) { |
69b7ef61 | 293 | syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m"); |
4033c8f6 | 294 | close(sock); |
3d42e160 | 295 | return (-1); |
69b7ef61 | 296 | } |
265a3175 MK |
297 | #endif |
298 | #ifdef SO_RCVBUF | |
4033c8f6 MK |
299 | for (on = bufspace; ; on -= 1024) { |
300 | if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, | |
301 | &on, sizeof (on)) == 0) | |
302 | break; | |
303 | if (on <= 8*1024) { | |
304 | syslog(LOG_ERR, "setsockopt SO_RCVBUF: %m"); | |
305 | break; | |
306 | } | |
307 | } | |
308 | if (traceactions) | |
309 | fprintf(ftrace, "recv buf %d\n", on); | |
265a3175 | 310 | #endif |
49dac2b7 | 311 | if (bind(sock, (struct sockaddr *)sin, sizeof (*sin)) < 0) { |
7fe7fe74 | 312 | perror("bind"); |
69b7ef61 | 313 | syslog(LOG_ERR, "bind: %m"); |
4033c8f6 | 314 | close(sock); |
7fe7fe74 | 315 | return (-1); |
69b7ef61 | 316 | } |
ca7465a6 KB |
317 | if (fcntl(sock, F_SETFL, O_NONBLOCK) == -1) |
318 | syslog(LOG_ERR, "fcntl O_NONBLOCK: %m\n"); | |
4033c8f6 | 319 | return (sock); |
7fe7fe74 | 320 | } |